Abstract
Recently, many improvements in electrical machines have been achieved by replacing conventional permanent magnets with high-performance rare-earth magnets made from materials such as NdFeB. However, the distribution of residual magnetization in permanent magnets is usually non-uniform, and the residual magnetization cannot be measured directly. Thus far, predictions of residual magnetization in permanent magnets have only been possible by using cut-and-try methods. To overcome this difficulty, this paper investigates the establishment of a magnetization estimation method using numerical techniques. The results of simulated magnetization using the improved variable magnetization and Stoner Wohlfarth equation (VMSW) method are compared with actual measurements.
